Plus one for electrical issues in your new kitchen. I would try listening to your system with the new kitchen fully operational as a baseline, then try:
1. Turning off all kitchen lights - listen
2. Turning off all breakers to your new kitchen (if possible) - listen
3. Try plugging your amp into P5 with all kitchen electrical devices on including the lights - listen, then repeat 1. & 2. above with amp plugged into P5.
This should tell you if something in the kitchen is the culprit, and if power conditioning is helpful. If you do not already, you may want to put your system on a dedicated AC supply line(s) and breaker(s), especially if as has been mentioned it now shares a line with the kitchen or some other potentially offending circuits as a result of the new construction.
My main system is on a dedicated 10 gauge supply line with its own 30amp breaker. I have a dimmer in the listening room (with incandescent bulbs), but it is on a different circuit. Amp plugged directly into wall with no direct filtering (but do have a conditioner plugged into the same socket for sources) and system is dead quiet, treble never sounded better.
Good luck!
1. Turning off all kitchen lights - listen
2. Turning off all breakers to your new kitchen (if possible) - listen
3. Try plugging your amp into P5 with all kitchen electrical devices on including the lights - listen, then repeat 1. & 2. above with amp plugged into P5.
This should tell you if something in the kitchen is the culprit, and if power conditioning is helpful. If you do not already, you may want to put your system on a dedicated AC supply line(s) and breaker(s), especially if as has been mentioned it now shares a line with the kitchen or some other potentially offending circuits as a result of the new construction.
My main system is on a dedicated 10 gauge supply line with its own 30amp breaker. I have a dimmer in the listening room (with incandescent bulbs), but it is on a different circuit. Amp plugged directly into wall with no direct filtering (but do have a conditioner plugged into the same socket for sources) and system is dead quiet, treble never sounded better.
Good luck!